CodeWall

Armadin, founded in 2025 in the USA, is a cybersecurity company built by the founders of Mandiant that uses AI to automate offensive security testing to counter AI hacking.

Bishop Fox is a US offensive security firm founded in 2005 in Tempe, Arizona as Stach & Liu and renamed around 2013-2014. It provides continuous penetration testing, red teaming, attack surface management (CASM) and application/cloud/network/product security assessments; clients include more than a quarter of the Fortune 100 and eight of the top ten global tech companies. Its in-house Cosmos AI engine accelerates vulnerability discovery and exploit-chain identification, and it offers AI/LLM security assessments and AI red teaming (prompt injection, jailbreaks, insecure tool calling).

Equixly, founded in 2022 in Florence, Italy, provides AI-powered "offensive" API penetration testing and security validation.

Strix (legal entity OmniSecure, Inc.) is a San Francisco-based open-source AI security company founded in 2025 by Ahmed Allam and Alex Schapiro. Its open-source product uses teams of autonomous AI agents that reason about targets, chain offensive tools and validate exploits across code, APIs, web apps, infrastructure and cloud, plugging into CI/CD and generating merge-ready fixes; the usestrix/strix repo has 40K+ GitHub stars.

Horizon3.ai, founded in 2019 in San Francisco, USA, develops NodeZero, an AI-powered automated red team platform that simulates real-world penetration testing.

Trident (Esprit Labs Inc.) is a San Francisco-based AI security company founded in 2025 and part of Y Combinator Summer 2026. Its autonomous AI agents continuously pentest web apps and APIs, review pull requests for n-day vulnerabilities and logic flaws before merge, and map cloud attack paths across AWS, Azure and GCP, delivering reproducible proof-of-exploit findings with remediation guidance.